Ntau- cov ntxaij lim dej tawm, tseem hu ua cov ntxaij lim dej lossis cov lim dej sib sib zog nqus, yog ib qho ntawm cov khoom siv tseem ceeb hauv cov txheej txheem dej ua ntej. Lawv lub tswv yim tsim qauv siv ntau lub lim tawm ntawm qhov sib txawv ntawm qhov sib txawv thiab qhov ntau thiab tsawg los ua ib qho zoo tagnrho lim txheej pore faib los ntawm sab saum toj mus rau hauv qab, los ntawm ntxhib mus rau nplua, yog li ua tiav siab -precision, siab - paug- tuav lub peev xwm sib sib zog nqus pom.
I. Tsim Cov Tub Ntxhais: Txheej Txheej Filter Bed Theory
Lub ntsiab drawback ntawm ib txwm ib txwm siv -media lim (xws li quartz xuab zeb) yog "surface filtration" ntawm lub txaj lim. Feem ntau ntawm cov khib nyiab uas tau coj los ntawm cov dej ntws yog daig hauv qhov chaw ob peb centimeters ntawm cov lim xov xwm, ua rau muaj kev nce ceev hauv lub taub hau thiab yuav tsum tau rov qab ntxuav dua.
Ntau- cov ntxaij lim dej tawm, los ntawm kev ua tib zoo xaiv ntawm ob lossis ntau qhov lim xov xwm, siv lawv qhov ceev thiab qhov sib txawv ntawm qhov sib txawv kom tau txais kev ruaj khov stratification tom qab ntxuav:
Tsawg- lim xov xwm ceev (xws li anthracite), txawm tias lawv qhov loj me me, yuav nyob hauv txheej sab saud.
High-ntaus lim xov xwm (xws li garnet thiab magnetite), txawm tias lawv cov khoom me me, yuav nyob ruaj khov nyob rau hauv qis dua.
Qhov no tsim cov txheej lim dej gradient nrog "loo saum thiab ntom hauv qab." Cov khoom loj uas raug tshem tawm hauv cov dej ntws yog thawj zaug los ntawm cov xov xwm lim dej sab saud, thaum cov khoom zoo dua raug ntes los ntawm qis dua, lim xov xwm. Qhov no ua rau kom qhov tob tob ntawm cov pa paug, zoo siv tag nrho cov lim txheej, yog li txuas ntxiv lub voj voog lim thiab txhim kho pom kev ua haujlwm zoo.
II. Cov ntsiab lus tseem ceeb thiab cov ntaub ntawv
1. Kev xaiv thiab teeb tsa ntawm Lim Media: Cov kev teeb tsa muaj xws li dual-media thiab triple- media.
Cov ntaub ntawv piav qhia:
Qhov Loj Particle Loj (d10): Hais txog lub sieve aperture txoj kab uas hla uas 10% ntawm cov xov xwm lim tuaj yeem dhau mus; nws yog ib qho tseem ceeb parameter characterizing lub coarseness ntawm lim xov xwm.
Uniformity Coefficient (UC): UC=d60/d10. Qhov ze dua tus nqi no yog rau 1, qhov sib txawv ntawm qhov loj me ntawm cov lim xov xwm. Feem ntau, tus nqi qis dua 1.7 yuav tsum tau txo cov txheej sib xyaw thaum rov qab ntxuav.
Txheej Qhov siab: Tag nrho cov lim txheej qhov siab yog feem ntau ntawm 800-1200 mm. Cov txheej anthracite yog qhov siab tshaj plaws los muab qhov chaw txaus rau cov kab mob.
2. Lim Vev
Kev pom kev tshaj tawm yog qhov tseem ceeb ntawm kev ua haujlwm tsis zoo hauv kev tsim, cuam tshuam ncaj qha rau cov dej ntws zoo thiab kev ua haujlwm.
Tus qauv tsim tus nqi ntws: 8-12 m / h.
Conservative/High-tus qauv tsim: 5-8 m/h tuaj yeem xaiv los kho cov dej tsis zoo lossis cov ntawv thov uas muaj cov dej ntws zoo heev.
High- qauv tsim: Txog li 15-20 m / h, tab sis feem ntau yuav tsum muaj cov dej nyoos zoo dua (tsawg dua turbidity) thiab ntau zaus rov qab; yuav tsum tau siv ceev faj.
Kev suav cov mis: Lim txoj kab uas hla (D)=2 × sqrt (Design flow rate (m³/h) / (Flow velocity (m/h) × π))
Piv txwv li: Tsim tus nqi ntws 100 m³ / h, xaiv qhov nrawm nrawm ntawm 10 m / h. D=2 × sqrt(100/(10 × 3.14) ) ≈ 2 × sqrt(3.185) ≈ 3.57m, tus qauv tank nrog txoj kab uas hla ntawm 3.5 meters lossis 3.6 meters tuaj yeem xaiv tau.
Multi- media filter design, multi-media filter xaiv SY price_features and parameters_usage method_application scope_Songyan Shanghai Pudong New Area - Pharmaceutical Machinery Industry Network
3. Rov qab ntxuav qhov system
Backwashing yog qhov tseem ceeb rau kev rov ua haujlwm lim dej. Kev tsim tsis tsim nyog tuaj yeem ua rau muaj teeb meem xws li lim xov xwm clumping, txheej sib xyaw, thiab tawm tawm.
Txoj kev rov qab siv dua: "Air-dej ua ke rov qab" feem ntau yog siv, uas yog qhov zoo dua li kev ntxuav dej ib zaug.
Anthracite: 12-15 L / (m²·s) (kwv yees . 43-54 m³ / (m²·h))
Quartz Sand: 13-16 L / (m²·s) (kwv yees . 47-58 m³ / (m²·h))
Kauj Ruam 1: Cua Scrub - Qhia cov cua compressed (siv approx. 50-60 m³/(m²·h)) txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhaws. Cov kauj ruam no yuav tsum tsis txhob tso dej los yog tsuas yog dej qis xwb.
Kauj Ruam 2: Dej Backwash - Yaug nrog dej huv (feem ntau yog lim dej) ntawm qhov siab siv hauv qab mus rau saum. Backwash siv yog ib qho tseem ceeb parameter.
Kauj Ruam 3: Tom qab Ntxuav - Tom qab rov qab ntxuav, yaug nrog dej hauv qhov kev pom zoo li ob peb feeb kom txog thaum cov dej ntws tawm kom meej (turbidity<1 NTU) before starting the next operating cycle.
Backwash Lub Sijhawm: Feem ntau siv sijhawm li 10-20 feeb, kom txog thaum lub turbidity ntawm cov dej ntws tsis txo qis.
Kev siv dej rov qab: Kwv yees li 1% -3% ntawm cov dej tsim tawm, uas yog qhov tseem ceeb ntawm cov dej siv tus kheej.
4. Tej yam kev mob rau kev ua hauj lwm Termination thiab rov qab ua kom rov qab
Differential Pressure Termination: Qhov no yog qhov feem ntau siv thiab txhim khu kev qha tswj txoj kev. Backwashing cia li pib thaum lub siab sib txawv ntawm lub txaj lim mus txog 0.05-0.08 MPa (kwv yees li 0.5-0.8 kg / cm²).
Lub Sijhawm Txiav Txim: Raws li qhov xwm txheej thaub qab, lub sijhawm ua haujlwm siab tshaj plaws (piv txwv li, 24-72 teev) yog teem los tiv thaiv qhov sib txawv ntawm qhov tsis tuaj yeem nce vim qhov kev txhim kho sai ntawm cov dej zoo.
Kev Txiav Txim Siab Zoo: Tsis tshua siv ib leeg, feem ntau yog lub tswb. Lub tswb yog tshwm sim thaum cov dej turbidity ntau tshaj li tus nqi (piv txwv li, 1 NTU).
III. Kev xav txog kev tsim qauv
Tank: Carbon steel lined nrog roj hmab lossis 316L stainless hlau. Kev tsim siab yog feem ntau 0.6 MPa.
Dej Distribution System: Sab saum toj tseem ceeb ceg yeeb nkab hom lossis hom baffle, kom ntseeg tau cov dej tsis sib xws thiab tiv thaiv kev tawm tsam ntawm cov lim xov xwm saum npoo.
Water Collection System: Ib feem tseem ceeb uas yuav tsum xyuas kom meej:
Uniform backwash faib dej tsis muaj qhov chaw tuag. Kev sau zoo ntawm effluent thaum pom. Tsis muaj dej ntws tawm ntawm lim xov xwm. Cov ntaub ntawv ntau: Dome phaj + lim cap, stainless hlau screen raj, lim cib, thiab lwm yam. Ntawm cov no, "dome phaj + ABS nceb-zoo li tus lim cap" yog tam sim no cov ntsiab lus tseem ceeb thiab txhim khu kev qha.
Tshem Tawm Chaw Nres Nkoj: Manholes yuav tsum muab rau saum thiab sab kom yooj yim pib sau thiab kev saib xyuas tom qab thiab hloov cov lim xov xwm.
IV. Performance Indicators thiab Applications
Inlet Water Requirements: Inlet turbidity feem ntau yuav tsum yog<20 NTU, ideally <5 NTU.
Qhov hluav taws xob dej raug: tuaj yeem ncav cuag<1 NTU; with good design and proper operation, outlet water can reach 0.1-0.3 NTU.
SDI (Sludge Density Index) Tshem Tawm: Ua kom muaj txiaj ntsig zoo ntawm SDI, muab kev tiv thaiv rau cov kab hauv qab rov qab osmosis (RO). Qhov zoo- ua haujlwm ntau- xov xwm lim tuaj yeem ua tiav qhov hluav taws xob SDI ntawm<5, or even <3.